Mark Larsen
NPI 1447223078 · Certified Registered Nurse Anesthetist · Norwich, CT
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Larsen is a Certified Registered Nurse Anesthetist provider in Norwich, CT (NPI 1447223078).
Provider details
- NPI number
- 1447223078
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 001769 (CT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
99 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Anesthesia for Other Procedure on Urinary System Through Urethra00910 | 36 | $86 |
| Anesthesia for Removal of Urinary Bladder Tumors Including Use of an Endoscope00912 | 17 | $116 |
| Anesthesia for Procedure on Anus and Rectum00902 | 16 | $102 |
| Anesthesia for Removal of Prostate Including Use of an Endoscope00914 | 16 | $180 |
| Anesthesia for Fragmenting, Manipulation And/Or Removal of Kidney Stone Including Use of an Endoscope00918 | 14 | $145 |
Typical Medicare-allowed amounts for these services range $86–$180 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-13
- Last updated
- 2012-08-02
Frequently asked questions
- What is Mark Larsen's NPI number?
- Mark Larsen's National Provider Identifier (NPI) is 1447223078, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Larsen's specialty?
- Mark Larsen is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Larsen located?
- Mark Larsen's practice location on file with NPPES is 326 Washington St, Norwich, CT 06360-2740.
- What is Mark Larsen's phone number?
- The practice phone number listed in the NPPES registry for Mark Larsen is (860) 823-6337.
- Does Mark Larsen accept Medicare?
- Mark Larsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Larsen's NPI active?
- Yes — Mark Larsen's NPI (1447223078) is active in the NPPES registry as of the last update on 2012-08-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.